Frank



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O Model.) P. M. GARLAND.

MACHINE GUN- No 513 995. Patented'Feb'. 6, 1894.

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ssnorrrcerronreming sm ar Letters Patent"hofs'iaeea datea February a, 1894.

Application filed April 3, 1893. Serial No. 468,924- (No model.) i

To aZZ whom it may concern.-

Be it known that I, FRANK. M. GAR-LAND, a citizen of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Machine-Guns, of which the following is a full, clear, and exact specification.

The invention relates to the class of machine or battery guns which arefired with great rapidity, and the object is to so construct such a gun that it will not become hot under the rapid explosions of the cartridges.

Referring to the accompanying drawingsz Figure l is a side elevation of a gunembodymg my improvement. Fig. 2 is an enlarged longitudinal section of the shell of such a gun. Figa Sis a. transverse section through the breech block; and Fig. l is a View looking at the muzzle.

In the views 1 indicates the shell of a gun of any common form and construction, mounted on any suitable carriage 2 and provided with any desired elevating mechanism in the form shown, this shell consists of several cylindrical sections of metal, preferably tape in the cascabel to the muzzie, in in t end of this shell are the loading and mechanisms, while in llie muzzle end are no barrels 4, Alt'ihe breech end these barrels are preferably threaded and screwed into threaded sockets in the block is formed on or attached to the extends across the interior of? the shell; near the muzzles the barrels are supported by a disk 7 that is secured to the interior walls of the shell by any suitable means, 1

v A narrowoasing 8 smaller than the exterior shell, inoloses the barrels, and this inner casing is usually made liquid tight and provided rent 9 through which liquid may be poured 'io fill the casing, in order that tern ture the barrels may be i down e ridges are exploded, This easing, snows, is supported at one end by the breech block 5, and at 'the other end by a hub on. the disk 7, one of these joints being preferably formed so that the casing may elongate under explosion, while the other is firmly held in place. Packihgs 10 and 11 are provided to prevent leakage of the liquid at the ends of the casing, and a packing 12 is provided where the barrels pass through the disk 7, so that they may expand without. allowing any leakage around them.-

Openings or passages 13 are made through the walls of the shell adjacent to the breaches of the barrels, and perforations 14 are made through the disk near the muzzles of the barrels for the passage of currents of air. It will be noticed that the end of the shell reaches farther forward than the muzzles, so that when the gun is fired, the explosions cause a vacuum in the shell at the end of the barrels, and to fill this void, air rushes from the interior ofthe shell through thevper: forations inthe disk which draws air in through vthe openings in the shell by the discharge, and these currents of air convey away heat in such manner that the liquid in the inner casingdoes not become superheated. These currents also prevent the exterior from becoming hot, so that it can be handled at any time for dismounting the gun or any other purposes. Of course the currents of air passing through in this manner may be utilized for keeping the exterior shell 0001, Without the use of a cooling liquid in the interior, if desired.

I claim as my invention 7 1. In combination with a machine gun, a

solid shell inclosing the barrels, said shell projecting beyond the inuzzles of the barrels, openings made through the shell near the breeches of the barrels, and perforations made near the inuzzles of the barrels, substantially as described and for the purpose specified.

2. In combination with a machine gun, a casing surrounding the barrels, with a vent for the introduction of liquid, a shell inclosing the casing, openings made through the shell near the breeches of the barrels, and perforations made near the muzzles of the barrels, substantially as described and 'for the purpose specified.

3. In combination with a machine gun, a

casing surrounding the barrels, one end of muzzles of the barrels, substantially'as dethe calsling supported by the breech'bilock and scribed and for the purpose specified. the t er end by a. disk, a vent for t e introduction of liquid into the casing, a shel l'sur- FRANK GARLAND 5 rounding the 'casing, openings made through Witnesses:

the shell near the breeches of the barrels, and S. W. WILSON, perforations made through the disk near the O. H. WEIDEMANN. 

